There’s two types of getting bigger
Either you do bodybuilding or powerlifting. Bodybuilding you’re going to build muscle mass over strength while powerlifting you’re going to build strength over muscle mass.
Bodybuilding is about muscle-mind connection with lighter weight and higher reps. Focusing on a specific muscle. I.e chest where you’re trying to use only your chest to push the bar
Powerlifting is about strength and using the main muscle group and some secondary muscles to push the weight. I.e bench you’d use mostly chest with some triceps involved to push the bar